Rotary disk type scraping brush head with removable radial blades



Aug. 30, 1949. F. D. JOHNSON ROTARY DISK TYPE SCRAPING BRUSH HEAD WITH REMOVABLE RADIAL BLADES 3 Sheets-Sheet 1 Filed April 29, 1947 Inventor Franklin 0. Johns on 1949- F. D. JOHNSON 2,480,739

ROTARY DISK TYPE SCRAPING BRUSH HEAD WITH REMOVABLE RADIAL BLADES Filed April 29, 1947 '5 Shee'ts-Sheet 2 24 i WW Aug. 30, 1949.

Filed April 29, 1947 F. D. JOHNSON 2,480,739 ROTARY DISK TYPE SCRAPING BRUSH HEAD WITH REMOVABLE RADIAL BLADES In verztar F rank/in D. Johnson l l I I l I I I Patented Aug. 30, 1949 OFFICE ROTARY DISK TYPE SCRAFING BRUSH HEAD. WITH REMOVABLE RADIAL BLADES Franklin D. Johnson, Battle Creek, Mich.

Application April 29,

1 Claim.

This invention relates to new and useful improvements and structural refinements in meat block brushes, more specifically, in a meat, block brush constituting the subject matter of U. S. Patent No. 2,101,394, which was granted tome on December '7, 1937.

While experimenting with a brush constructed in accordance with the teachings of the afore-= said patent, it has been found that thesarne lends itself to certain structural and operational improvements, whereby the construction. thereof may not only be considerably simplified, but its functional utility may also be considerably enhanced.

It is, therefore, a primary object of the instant invention to provide a device which embodies such improvements in its construction and which, like the original invention, consists of a rotary brush assembly, such as may be guided by hand across the surface of the meat block, so as to clean and scrape the wood for the purpose of removing foreign matter therefrom.

A further object of the invention is to provide a brush which may be directly attached to and driven by a conventional electric hand drlil with the chuck thereof removed, or alternatively, which may be remotely actuated through the medium of a flexible drive cable.

Another object of the invention is to provide a meat block brush which is simple in construction, which will not easily become damaged, and in which the brush members, when worn, may be easily and conveniently replaced.

An additional object of the invention is to provide a meat block brush which will readily lend itself to economical manufacture and which is otherwise adapted for the purpose for which it is intended.

With the above more important objects in veiw, and such other objects as ma become apparent as this specification proceeds, the invention consists essentiall of the arrangement and construction of parts as illustrated in the accompanying drawings, in which:

Figure 1 is a perspective veiw of the invention, showing the same in association with an electric hand drill, the chuck of the latter being removed.

Figure 2 is an underside plan view of the brush head per se.

Figure 3 is a cross sectional view, taken substantially on the plane of the line 3-3 in Figure 2,

Figure 4 is a, cross-sectional view, taken substantially in the plane of the line 4-4 in Figure 3.

Figure 5 is a cross-sectional View, taken substantially in the plane of the line 5-5 in Figure 3.

1947, Serial Nor 744,719

Figure 6 is an exploded perspective viewof a shell and cover used in the invention.

Figure 7 is a perspective view of onev of the spacer blocks. 5 Figure 8 is a perspective view of another of the spacer blocks.

Figure 9 is a perspective view of one. of the wedges used in association with the block shown in Figure 7. V

Figure 10 is a perspective view of one of the brush. members used in the invention, and a Figure 11 is a side elevational view of a protector hood, such. as may be conveniently employed with the inventien.--

Like characters of reference are used to designate like parts in the specification and throughout the several views.

Referring now to the accompanying drawings in detail, the invention consists of a meat block brush designated generally by the reference char-.- acter it, the same embodying in its construction. a circular disc 15 provided with a marginal flange l? and forming a casing l 8.

.A hub member l9 is secured concentrically to the disc l6-by means of suitable screws 2c; the member 19 being provided with a tubular shaft extension '2! which projects through a suitable opening formed in the disc 45 and constitutes a shaft; as it were, for the brush assembly as a whole, It will be noted that the attachment of the hub member 19 to the disc H5 is reinforced by an annular plate or washer 22, which is also held in position by the aforementioned bolts or screws 2!).

A plurality of brush members 23 are radially disposed in the casing I 8, each of these brush members consisting of an elongated plate provided in one longitudinal edge thereof with a series of notches defining a row of substantially rectangular fingers 24, as is best shown in Figure 10.

A circular cover 25 is receivable in the casing I 8, the configuration of the cover being best shown in Figure 6, wherein it will be noted that the cover consists of a central hub portion 25, a plurality of radially extending spokes or arms 21, and a marginal rim 28.

A plurality of tapered spacing blocks pref erably formed from hard rubber or the like, and best shown in Figure 8, are interposed between the plates forming the brush members 23. It will be noted that these spacing blocks as well as the brush members, are arranged in such manner that the fingers 24 0f the brush members may project outwardly through the openings formedbetween the cover spokes 21..

Further spacing blocks 3!, having a tapered configuration, are positioned immediately over the spokes 21, and it should be understood that 60 while the aforementioned blocks 29 are tapered longitudinally so as to facilitate the assembly of the brush memrbers 23 in the radial formation, the blocks 3| are tapered longitudinally as well as in the thickness thereof, so that a pair of complementarily tapered wedges 32 may be positioned immediately adjacent the blocks 3|, as is best shown in Figure 5.

The brush members 23, the blocks 29 and 3|, as well as the wedges 32 are provided at the inner and outer ends thereof with suitable notches or recesses forming inner and outer sets of keeper seats 33, 34 respectively. These seats are so arranged that when the cover 28 is applied to the casing l8 and an annular keeper ring 35is positioned adjacent the inner surface of the cover, the keeper ring will be received in the outer set of seats 34 and will thereby assist in retaining the components 23, 29, 3| and 32 in position.

It should be understood that the cover 25 is removably retained in position by means of a plurality of bolts or screws 36 which extend through suitable apertures formed in the spokes 2'5 and in the blocks 3!, and pass through further apertures provided in the disc [6.

A further keeper rin ji, equipped with an annular, projecting shoulder 38, is interposed between the aforementioned hub member |9 and the hub portion 21 of the cover 25, the shoulder 38 of the ring 31 being receivable in the inner set of keeper seats 33, as is best shown in Figure 3. Needless to say, the ring 31 is retained in position by the aforementioned bolts or screws 29, as will be clearly apparent.

It will be found that when the brush is assembled, the clamping of the cover 25 upon the blocks and wedges 29, 3| and 32 will assure that the brush members 23 are rigidly retained in position, primarily by virtue of the resiliency of the blocks 29. Thereupon, the drive shaft 2| of the brush may be secured in any suitable manner to a convenient source of power, as exemplified in Figure 1 by an electric hand drill 39, from which the conventional chuck assembly has been removed.

The entire device may then be applied to the meat block (not shown) by holding the handles 40, 4| of the electric drill assembly, and engaging the fingers 24 with the surface of the block. The blocks 29, interposed between the members 23, will function as shock absorbers or cushions, thereby allowing the brush to work smoothly on uneven surfaces and increasing the life span of the brush members 23.

After the fingers 24 have become worn, the brush members 23 may be quickly and easily replaced by simply separating the cover 25 from the casing l8, whereby immediate access to the components 23, 29, 3| and 32 may be had.

If desired, the operator may protect himself against flying particles of foreign matter by installing a protector hood 59 over the brush assembly [5.

This hood is shown in the accompanying Figure 11, and consists of a suitable casing which is adapted to receive the brush assembly 15 therein. The casing 5| is provided with a suitable extension 52 whereby it may be mounted on the head portion 53 of the drill 39, the extension 52 being, in turn, with a suitable extension 54 through which the handle 49 may project.

The lower edge portion of the casing 5| is equipped with an annular band 55 formed from flexible material such as leather or the like, the

band bein attached to the casing 5| by a plurality of rivets, or the like, 56. The band 55 will, of course, permit the brush fingers 24 to be brought into contact with the meat block surface, while at the same time, particles of foreign matter will be prevented from flying in the direction of the operator.

It should be noted that by virtue of the flexible band 55, the entire brush assembly may be manipulated on uneven surfaces, such as are usually found on meat blocks.

Finally, it may be added that while the acccmpanyin drawings illustrate the invention as being directly attached to the hand drill 39, the drive shaft 2| of the brush assembly may be operatively connected by means of a length of flexible cable to any suitable source of motive power, whereby the brush assembly will assume a portable character, in which form it may be conveniently manipulated by hand, Without carrying the drill motor assembly 39 as a component part thereof.

It is believed that the advantages and use of the invention will be clearly apparent from the foregoing disclosure and accordingly, further description at this point is deemed unnecessary.

While in the foregoing there has been shown and described the preferred embodiment of this invention it is to be understood that minor changes in the details of construction, combination and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as claimed.

What I claim as my invention is:

A meat block brush comprising in combination, a circular disc provided with a marginal flange and formin a casing, a drive shaft secured to said disc, a plurality of radially disposed brush members positioned in said casing, each of said members comprising an elongated plate formed in one longitudinal edge thereof with a series of notches defining a row of substantially rectangular fingers, a plurality of tapered spacing blocks interposed between said plates, said plates and said blocks being notched at the ends thereof to form inner and outer sets of keeper seats, a circular cover receivable in and removably secured to said casing, said cover being formed with openings, said fingers projecting outwardly through said openings, and a pair of keeper rings each engaging one set of said seats, said rings being removably retained in position by said cover.

FRANKLIN D. JOHNSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 943,102 Schleicher Dec. 14, 1909 1,007,888 Parker Nov. '7, 1911 1,048,233 Tideman Dec. 24, 1912 1,054,145 Shore Feb. 25, 1913 1,311,550 Bullock et al. July 29, 1919 1,446,896 Fuller Feb. 2'7, 1923 1,641,103 Small Aug. 30, 1927 2,102,919 Rusoff Dec. 21, 1937 1,168,692 Vidal Aug. 8, 1939 2,322,718 Pease June 22, 1943 

